Table 4.
Plackett-Burman experiment design and response values.
| Run | X1 | X2 | X3 | X4 | X5 | X6 | Bacteriocin Activity (AU/mL) a |
|---|---|---|---|---|---|---|---|
| 1 | +1 | −1 | −1 | −1 | +1 | −1 | 640 |
| 2 | −1 | +1 | +1 | −1 | +1 | +1 | 960 |
| 3 | +1 | +1 | −1 | +1 | +1 | +1 | 1280 |
| 4 | +1 | −1 | +1 | +1 | +1 | −1 | 640 |
| 5 | −1 | −1 | +1 | −1 | +1 | +1 | 1280 |
| 6 | +1 | +1 | +1 | −1 | −1 | −1 | 1280 |
| 7 | +1 | −1 | +1 | +1 | −1 | +1 | 1280 |
| 8 | −1 | −1 | −1 | −1 | −1 | −1 | 960 |
| 9 | −1 | −1 | −1 | +1 | −1 | +1 | 1920 |
| 10 | −1 | +1 | +1 | +1 | −1 | −1 | 960 |
| 11 | +1 | +1 | −1 | −1 | −1 | +1 | 2560 |
| 12 | −1 | +1 | −1 | +1 | +1 | −1 | 960 |
a Values listed are the averages of three experiments. X1: glucose, X2: yeast extract, X3: dipotassium phosphate, X4: manganese sulfate, X5: Tween 80 and X6: sodium acetate.